How to Reduce Selection Bias
Enroll study participants who reflect your target population.. Select study participants at random who meet your criteria.. Do a pilot study to identify potential problems.
Steps
Enroll study participants who reflect your target population.
Enroll study participants who reflect your target population.
Select study participants at random who meet your criteria.
Select study participants at random who meet your criteria.
Do a pilot study to identify potential problems.
Do a pilot study to identify potential problems.
Create an operations manual to standardize all study procedures.
Create an operations manual to standardize all study procedures.
Assign participants to intervention or placebo groups randomly.
Assign participants to intervention or placebo groups randomly.
Keep each participant's group assignment double-blind.
Keep each participant's group assignment double-blind.
Collect basic demographic information from potential participants.
Collect basic demographic information from potential participants.
Select controls using the same process as your cases.
Select controls using the same process as your cases.
Avoid choosing controls from hospital populations.
Avoid choosing controls from hospital populations.
Match controls with cases based on similar demographics.
Match controls with cases based on similar demographics.
Use population data instead of recruiting participants as controls.
Use population data instead of recruiting participants as controls.
Include the variable associated with the selection bias in your analysis.
Include the variable associated with the selection bias in your analysis.
Weight participant responses to correct a biased sample.
Weight participant responses to correct a biased sample.
Discuss the potential for selection bias in your report.
Discuss the potential for selection bias in your report.
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